Lewis Peaks () are two prominent peaks, 1,065 m, standing 3 nautical miles (6 km) east of Day Island and surmounting the west part of Arrowsmith Peninsula on the west coast of Graham Land. First roughly surveyed in 1909 by the French Antarctic Expedition under Charcot. Resurveyed in 1948 by the Falkland Islands Dependencies Survey (FIDS) who named it for Flight Lieutenant John Lewis, pilot of the Auster airplane which was used from the John Biscoe for reconnaissance of ice conditions in Marguerite Bay in February 1950.
This article incorporates public domain material from the United States Geological Survey document "Lewis Peaks" (content from the Geographic Names Information System).